this is video of roger clemens arriving at court today. the feds started their opening statements saying that needles and cotton balls, clemens' former trainer said he used to inject the former star tested positive for dna and anabollic steroids. he says he did not take the drugs and the trainer is fabricating evidence. clemens is on trial for lying to congress about using performance enhancing drugs. if convicted, he could face 30 years in prison. >>> a small dog has led to a big controversy in one valejo neighborhood. mail service to an entire block was suspended after a postal carrier had a run-in with a dog named mocha. but as claudine wong reports, neighbors are not convinced mocha was a threat. >> reporter: for days, mail boxes in this neighborhood sat empty. postal carriers did not come to this block on friday, saturday or monday. the reason, this little dog named mocha. mocha is a 1 1/2-year-old chihuahua who has lived in the neighborhood for a couple of months. >> you know the dog? >> yeah, i met the dog before. >> reporter: mocha